Grignard reagent

An organomagnesium reagent commonly written $\mathrm{RMgX}$, with organic group R and halide X. Its carbon group can act as a nucleophile; actual solution structures depend on solvent and aggregation.

A grignard reagent in which magnesium is attached directly to an alkenyl carbon, $\mathrm{RCH}=\mathrm{CHMgX}$. Addition to a carbonyl compound can form an allylic alcohol while retaining the geometry of the pre-existing alkene.

${\mathrm{C}}_6{\mathrm{H}}_{11}\mathrm{MgBr}$, a cyclohexyl-transfer grignard reagent.

The straight-chain four-carbon grignard reagent $\mathrm{C}{\mathrm{H}}_3(\mathrm{C}{\mathrm{H}}_2{)}_3\mathrm{MgBr}$ when the n-butyl form is specified.

$\mathrm{C}{\mathrm{H}}_3\mathrm{MgBr}$, a methyl-transfer grignard reagent in the usual organometallic accounting.

${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{MgBr}$, a phenyl-transfer reagent that can open an epoxide by attack at carbon.

$\mathrm{C}{\mathrm{H}}_3\mathrm{MgI}$, a methyl-transfer reagent in carbonyl addition.